IRS · United States

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Form 14039: Identity Theft Affidavit

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Quick answer

Form 14039, Identity Theft Affidavit, tells the IRS that someone may have used your Social Security number to file a fraudulent return or that you are a victim of identity theft affecting your taxes. You explain the situation, confirm your identity, and submit it so the IRS can flag and protect your account. With JustFill you upload the blank IRS 14039 PDF, the AI detects each field, and you complete and download it free to mail or fax.

Form: Form 14039
Issued by: IRS
Country: United States
Cost to fill: Free

What is Form 14039?

Form 14039 is the IRS Identity Theft Affidavit. You file it when your e-filed return is rejected because a return was already filed under your SSN, when the IRS notifies you of suspicious activity, or when you otherwise believe your tax account has been compromised. Filing it prompts the IRS to mark your account, investigate, and help resolve the fraudulent filing. JustFill lets you complete the 14039 online so the affidavit is legible and complete before you submit it with a copy of your ID.

Download the Form 14039 form PDF — free

The official Form 14039 PDF is free to download from the IRS at irs.gov. Open the blank PDF in JustFill to type your identity-theft details and contact information on screen, then download the completed affidavit to sign and submit with a copy of your ID.

Get the official Form 14039 PDF from IRS

Who fills out Form 14039?

Taxpayers whose e-filed return was rejected as a duplicate under their SSN
People who received an IRS notice about a return they did not file
Victims of identity theft who want to protect their tax account
Parents or guardians filing on behalf of a dependent whose SSN was misused

Field-by-field breakdown

What each section of Form 14039 asks for. JustFill’s AI will detect these fields automatically when you upload the PDF — review the breakdown below so you know what to enter.

Section A — Reason for filing

Whether you are a victim, or filing on behalf of someone else.

Section B — Identity theft information

A description of the identity theft and the tax years affected.

Section C — Taxpayer information

Your name, SSN/ITIN, current and prior addresses, and phone.

Identity verification

You submit a copy of a government-issued ID (driver's license, passport, etc.) with the form.

Signature & date

Signed under penalty of perjury attesting the information is true.

Common mistakes to avoid

1Forgetting to attach a copy of a valid government-issued photo ID.
2Leaving the affected tax year(s) blank, which slows the IRS investigation.
3Sending it to the wrong address — follow the instructions on any IRS notice you received.

How JustFill helps you complete Form 14039

AI field detection

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Form 1040

Form 1040, U.S. Individual Income Tax Return

Internal Revenue Service (IRS)

Form 1040-X

Form 1040-X, Amended U.S. Individual Income Tax Return

Internal Revenue Service (IRS)

Form 4506-T

Form 4506-T, Request for Transcript of Tax Return

Frequently asked questions

File it if your e-filed return was rejected as a duplicate, if the IRS sends you a notice about a return you did not file, or if you believe your SSN was used fraudulently for taxes.

Yes. Upload the official IRS PDF to JustFill — the AI detects each field and lets you type your answers, then download the completed affidavit to sign and submit with your ID.

If you received an IRS notice, follow its instructions. Otherwise mail or fax the signed affidavit with a copy of your government-issued ID to the address in the form instructions.

The IRS flags your account for identity theft, investigates the fraudulent filing, and works to resolve it. You may later be issued an Identity Protection PIN for future filings.

Official source: Form 14039 on IRS’s website

JustFill is an independent product and is not affiliated with, endorsed by, or sponsored by IRS or any government agency. Always verify your completed form on the official version before signing or submitting.